Oil-well pump



(No Model.)

W. J. WRIGHT.

OIL WELL PUMP.

No. 599,544. Patentedeb. 22, 1898.

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WILLIAM JAMES VRIGIIT, OF PITTSBURG, PENNSYLVANIA.

@lb-WELL PUMP.

SPECIFICATION forming part of Letters Patent No. 599,544, dated February 22, 1898.

Application llcd October l0, 1896. Serial No. 608,534. (No model.)

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Beit known that LWILLIAM JAMES WRIGHT, residing at Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented a new and Improved Oil-Vell Pump, of which the following is a specification.

My invention relates to certain improvements in oil-well pumps, the objects of which will hereinafter appear, such invention consisting in the peculiar combination and novel arrangement of parts, such as will be fully described in the following detailed description, and specifically pointed out in the appended claims, reference being had to the accompanying drawings, in which- Figure 1 is a sectional view of a portion of an oil-well with my improvements shown in an operative condition in side elevation. Fig. 2 is a similar view, the pump mechanism being shown in section. Fig; 3 is a vertical section showing one of the cages lifted and the friction or wedge locks out of engagement with the walls of the well. Fig. 4: is a horizontal section of the pump, taken on the line A -I of Fig. 2. Fig. 5 is a similar view taken on the line 5 5 of Fig. 3.

The main object of the invention is to lift the fluid without the use of large tubing, whereby to reduce the expense of getting the Well ready for operation. This I effect by inclosing the cage of working valve or plunger and forcing the iiuid out through smaller tubes and using such smaller tubes as connections to manipulate either the working valves, working barrel, or plungers, thereby dispensing with the ordinary sucker-rods or operating-line, the small tubing in this construction of pump taking their place, and as the fluid gets outlet through the connectiontubes instead of on the outside but one connection to the barrel is necessary instead of vices and correspondingly relieve the anchor or rope devices of such weight, the several parts being also so arranged that when necessary to draw the barrel out of the Well to replace the valve there will be no great Weight to lift.

Referring now to the drawings by numerals, in which like numerals indicate like parts in all the figures, 1 indicates the working barrel, on the upper end of which is held a cage 2, which has a limited free slide movement on the barrel 1, and is provided with an aperture 3 in its base, through which the'connecting or lift tube 4 passes, which has also a colllar 5, which the lower end' of the cage 2 is adapted to engage when'lifted in the Amanner presently described. The cage 2 has a series of pivoted dogs or clutches G 6, pivotally hung at their upper ends in such a manner that their lower ends can be swung out, as shown in Fig. 2, and thereby form wedge members, the `front or outer faces of which are serrated to firmly engage the walls of the well, as shown.

By referring now more particularly to Fig. 3, it will be seen that the working barrel 1 has a packing 7, which when the parts are in their operative position, rests against the threaded collar 8, secured on the upper end of cage 2, and such barrel l is also provided with a shoulder 9, with which a stop l0 on the plunger or connecting-tube 18 engages when such tube is lifted, as will presently appear.

The lower end of the connecting-tube 4 is threaded to receive the second or lower cage 11, which is also provided with pivoted wedgelock dogs 12 12, the inner edges of which, as also the dogs 6 6, are made tapering or inclined, for a purpose presently explained.

The base of the cage 11 is apertured, as at 13, for the passage of the anchor-tube 14, the upper end of which has a collar 15, held within the cage 11, as shown.

16 indicates the feed-pipe, held within the anchor-pipe, from which it receives supply, as such pipe has suitable fluid perforations 17, the upper end of said feed-pipe passing up into the cage 1l and having a screw or shoulder connection with the lower end of` the Working barrel 1.

IOO

The connecting-tube 18, which also forms adischarge-tube, has a plunger 19 connected to its lower end, which is provided with a suitable valve 2O at the upper end, as clearly shown.

22 indicates the ordinary standing valve, held in the lower end of the barrel 1.

It will be noticed by reference to the drawing, the plunger 19 consists of a series of tubes and barrels 23, having bell portions, some of which are turned up, while the others are turned down, so as to effect a scraping action on the barrel at both the up-and-down movements of the plunger and clean off any sand that may gather on the inside of the barrel 1.

The connection-tube 1S in practice may be operated by the beam or any other connection, the same as are used to operate the ordinary pump-rods, or by ropes.

From the foregoing` description, taken in connection with the accompanying drawings, it is thought the construction and operation of my improved pump will be readily apparent to those skilled in the art to which it appertains.

It will be clearly seen that the point where the cages are to be supported in the well can be governed by the length of the anchor-tube, in that when the entire pump mechanism is lowered and the anchor-tube reaches bottom, and the lower cage having a slight free movement on the anchor-tube, it, as well as the upper cage and connections, will continue down until the wedge-dogs engage the collar on the upper end of such anchor-tube and are forced out into a wedge-locked engagement with the sides of the well, at which time the working barrel 1, tube 4i, and the pump-operating connections remain stationary, the upper cage, however, continuing down until its lockdogs are forced out by engagement with the collar 5, when it will be held iirmly in the well. It will thus be seen the parts will then be in a position to allow the pump or plunger devices to operate freely to lift the tluid.

When it is desired to raise the cages to readjust or renew the valves, the connectionrod is lifted sufticiently to bring its `stop-co1- lar in engagement with the shoulder of the 'upper cage, which as it rises frees the lockdogs from engagement with the collar 5 and allows them to swing inward, it being obvious that in the upward movement the cage 2 will lift the collar 5, the tubing 4:, and lower cage, the dogs of such lower cage also automatically resuming their unlocked position.

When the cages are held locked to the wall of the well, the anchor-tube is practically freed of the strain of supporting the pump mechanism, as the same is transmitted to the sides of the Well.

.By providing pumping mechanism constructed and arranged as shown the same can be lowered and secured at any desired place, the working valves or plungers being ready for operation by the connection or operating tube, which also forms the outlet for the liuid.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is-- 1. An oil-well pump, comprising an upper cage and a lower cage, a connecting-tube connected to the lower cage and having its upper end projected into the upper cage, said upper cage having a limited free movement on the connecting-tube; the anchor-tube projected into the lower cage, said lower cage having a limited free movement on the upper end of such anchor-tube, said cages having means to engage the wall of the well as they drop therein by gravity, a plunger and a lift-tube joined thereto, having means for engaging and lifting the supporting-cage, said plunger having a valve, all being arranged substantially as shown and described.

2. An oil-well pump, comprising an upper and lower supporting-cage, said cages having means for engaging the sides of the well, a connecting-tube tixedly connected to the lower cage and having its upper edge projected into the upper cage, said upper cage having locking means for engaging the sides of the well, the upper end of the connecting-tube having a head portion to engage such locking means and move them into a locked position as the said upper cage drops into position, said lower cage also having locking means to engage the walls of the well, an anchor-tube having its upper end projected into the lower casing and provided with a head member to engage its locking means, said anchor-tube having a valve 22, the tube 1 connected to said anchortube and to the end of the upper cage, and the plunger having a valve 2O and means for engaging and lifting the upper cage, all being arranged substantially as shown and described.

3. An oil-well-pump mechanism comprising a working barrel, an upper cage having alimited free movement thereon, a tube 4 surrounding the working barrel movable in but supported by the upper cage, and having a cage at its lower end fitted over the end of the working barrel, an anchor-tube loosely held in the lower cage, said cages having pivoted lock-dogs adapted to be moved outward by engaging the ends of the tube 4 and the anchor-tube, and the feed-pipe, the plunger, the valves, and the tubular connecting and lift pipe, having means for engaging the upper cage when drawn upward as specified.

1l. A pump mechanism comprising a working barrel having suitably-arranged valves and a feed-pipe, cage or supporting members having a limited movement on the working barrel but adapted to be moved in unison with the workin g barrel when lowered into the well to a predetermined distance and having locking means adapted to move into engagement with the walls of the well when such cages move down on the working barrel, a plunger in the working barrel and a combined lift and operating tube connected to the plunger, arranged to have a free pumping action when the cages are held at rest and adapted to IOO move such cages to a released position when pipe 4 having collar 5, cage 1l having dogs it is pulled up out of the Well as specified. l2, and the anchor-pipe I4 having collarl l5 lo 5. In an oil-WelLpump mechanism the comall being arranged substantially in the manbination with the working barrel l, the feedner shown and for the purposes described.

5 pipe 16 connected thereto, the Valves 2O and WILLIAM JAMES WRIGHT.

22, the plunger, and the tube I8, having stops l lVitnesses: l0, said barrel l, having a shoulder 9, of the XV. M. DALGTEESH,

cage 2, having pivoted dogs 6 and collars 8, the A. A. BATGHELOR. 

